tucker



v(Model.) 2 sheets-'sheet 1.

R. D.TUCKBR. A Y

SEWING MACHINE; No. 320,898. Patented June 23, 1885.

' 2 Sheets-Sheet 2. R. D. TUCKER.

SEWINGv MACHINE.

(Model.)

N0l 320,898. Patented June 23, 1885.

UNITED STATES PATENT OFFICE.

ROLLN D. TUCKER,- OF LYNN, MASSACHUSETTS, ASSIGNOR TO THE TUCKER SEAM VVELTING AND MACHINE COMPANY, OF NASHUA, N. H.

SEWING-MACHINE.

SPECIFICATION forming part of 'Letters Patent No. 320,898, dated June 23, 1885.

Application filed June 13, 1884.

To all whom, it may concern:

Be it known that I, ROLLIN D. TUCKER, of Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Sewing- Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention relates to sewingmachines; and it consists in a new and novel mechanism for moving or feeding along the material to be sewed, as also in` certain details of construction, all of which are hereinafter more fully described, and specifically pointed out in the claims. I

In the accompanying drawings, Figure 1 is an end elevation of a sewing-machine embodying my invention. Fig. 2 is an end elevation of the parts which compose the feed mechanism, and Fig. 3 is a plan of the mechanism shown in Fig. 2, and also the Welt-guide. Fig. 4 is a perspective view of the plate A detached, with the upper' clamp. Fig. 5 is a perspective view of the welt-guide. Fig. 6 is a perspective view of the plate B. Y

In manufacturing boots and shoes it is cus-J tomary to place afolded welt between the two pieces of material to be stitched together and s3w through the whole, leaving the folded edge of the welt slightly projecting in order to give a finish to the seam. A seam formed in this manner gives a most beautiful and gratifying appearance; but difficulty has been eX- perienced in t-he operation of forming the seam as desired. Heretofore it has been attempted to form the seam with an ordinary sewingmachine, and many useful attachments havel (Model.)

all respects, excepting` the feed mechanism, the same as the Willcox 8f. Gibbs, which is well known to those skilled in the art to which it pertains, and will not therefore be described in this specication. L

'The feed mechanism ordinarily employed in this machine is of course entirely dispensed with, and in the accompanying drawings so much only of the machine is represented as is necessary in order to explain the arrangement 6o and operation of my improved feed mechanism in connection therewith.

My improved feed mechanism is composed, mainly, of the parts represented in Fig. 2 of the drawings, and comprises the horizontal plate B, which is provided with a central opening to receive the cam e, and also supports the vertical plate A, which plate A is fitted to slide vertically in asuitable groove or channel formed in the plate B. The upward move! 7o ment of the plate A is effected by the cam e, the point a on this cam being adapted to act upon the projection b of the plate for this purpose. The downward movement of the plate is effected by means of the springf. The cor- 7 5 rugated shoe b, which forms the upper clamp, is secured to and moved by the plate A, while the shoe n, which forms the bottom clamp. is secured to and moved by the plate B. The combination of this mechanism in the machine 8o is represented in Fig. l, by reference to which it will be understood that the plate B is secured to the machine-frameby screws t t. Said screws are provided with shanks' or thimbleblocks adapted to tit the holesmm in the plate 8 5 loosely, and said holes are made sufficiently long to allow the plate to be moved horizontally for the purpose of feeding the material along. The forward movement of the said platel B is effected by cam e, the pointson the 9o cam being adapted to operate against the side of the plate B for this purpose. Said cam is fixed upon the looper-shaft of the machine,

.just back of the looper T, as shown in Fig. l.

The backward slide of the plate B is effected by the spring W. The plate A is provided with an upwardly-projecting rib or plate7 y, which serves as a guard by which to guide the work-that is, the material to be served-and the folder or welt-guide N, of ordinary form, 10o

as hereinafter set forth, is attached directly to this rib y, as fully represented in Figs. 3 and 5.

In operating the machine the work man first places the welt portion in the welt-folder N, allowing t-he folded end thereof to reach forward to the machine-needle. He then places the two pieces of material in position, one above and the other below the welt-strip, and puts the edge of the whole between the clamps a and b, whereupon the machine should be started up in the usual manner.` The first operation is to move forward the plate B, and with it, of course, the plate A. This is effected by the cam e, as above described. The material to be sewed is in this way moved forward while securely clamped between the clamps a and b. The needle thereupon descends and goes through the material to form the stitch in the usual way, and thereupon the plate A is lifted by cam e, as described. rllhe plate B then returns back to the point of starting, thus carrying the clamps into position to take a new hold. The clamps are then brought to bear upon the material a second time, and then the needle rises to allow the material to be advanced, as before. It should be observed that the material is moved forward while securely clamped between the presserfeet or clamps a and b,- that said clamps bear upon opposite sides of the material, and advance simultaneously forward in a horizontal or nearly horizontal line. .It should be also observed that the welt-guide and thev clamps move forward together when carrying the material into position to receive the action of the needle, and when the needle has descended through the material` thus brought into position the guide and clamps are made to return for anew hold upon the material before the needle is lifted out of the material. A feed mechanism operating in this manner will prevent the material from slipping out of position while being moved forward, and the material is held in such position while the feed returns for a new hold, and the feed mechanism in thus returning from the needle draws into position that part of the material which is thus drawn out between the needle and the feed clamps, so as to keep the seam smooth and free of puckerings.

I have in this specification used the term welt-folder,7 but I do not wish to be understood as thereby saying that the welt is necessarily folded. It is quite customary to fold the welt; but it is not always folded.

The welt -guide which I use is well known to the trade. It is simply a piece of thin sheet metal folded over upon itself once, thereby forming a suitable groove or channel, through which the welt-strip is to be drawn either in a folded or in a plain strip, as the occasion requires.

What I claim, and desire by Letters Patent to secure, is-

l. A feed mechanism for sewing-machines, consisting of two clamps, both carried on a block or carriage, one of the clamps being movable, a cam for moving the block or carriage forward and also for raising one clamp, and mechanism for moving the block and clamp in reverse direction, all substantially as described.

2. A feed mechanism for sewing-machines, consisting of a lower fixed clamp and an upper movable clamp, both carried on a laterally-movable block, cams on the main shaft adapted to raise the upper clamp and advance the movable block, and mechanism to return the block and depress the movable clamp, all substantially as described.

3. In a sewing-machine, and in combination with the clamps which hold and feed the material, a weltguide movable with the feedclamps, substantially as described.

4. In a sewing-machine, au upper and lower clamp for clamping the material carried on a laterally-moving block, mechanism for separating the clamps, a welt guide fixed to the said laterally-moving block, and mechanism for moving the block, all substantially as described.

5. In a sewing-machine, a laterally-moving Nblock having a fixed lower and movable up- Uper clamp and a Xed Weltguide, cams on the main shaft for advancing the block and lifting the movable clamp, and mechanisms for giving the return movements to the movable clamp and block, substantially as described.

Signed at Lynn in presence of two witnesses.

ROLLIN D. TUCKER. Witnesses:

CHARLES F. PooLER, VALTER A. STEWARD.

IOC 

